Function Unique

cli/command/completion/functions.go:239–260

Unique wraps a completion func and removes completion results that are already consumed (i.e., appear in "args"). For example: # initial completion: args is empty, so all results are shown command one two three # "one" is already used so omitted command one two three

(fn cobra.CompletionFunc)

//	command one <tab>
//	two three
func Unique(fn cobra.CompletionFunc) cobra.CompletionFunc {
	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
		all, dir := fn(cmd, args, toComplete)
		if len(all) == 0 || len(args) == 0 {
			return all, dir
		}

		alreadyCompleted := make(map[string]struct{}, len(args))
		for _, a := range args {
			alreadyCompleted[a] = struct{}{}
		}

		out := make([]string, 0, len(all))
		for _, c := range all {
			if _, ok := alreadyCompleted[c]; !ok {
				out = append(out, c)
			}
		}

		return out, dir
	}
}